mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
88167e74d1
This flag is a GNU extension, and would cause misleading test failures on other platforms where this extension is not available. However, the necessity to switch line endings is only required on Windows when testing. We could use sed to canonicalize line endings before comparing, but that may cause higher amounts of filesystem traffic on Windows which would slow down testing. Instead, move the substitution for diff in SourceKit's lit.local.cfg up to the top level, and conditionalize the substitution which has the flag on Windows, but not on other platforms (where it should not be required).
113 lines
3.0 KiB
Swift
113 lines
3.0 KiB
Swift
// RUN: %empty-directory(%t)
|
|
// RUN: %target-swift-frontend -c -swift-version 4 -primary-file %s -emit-migrated-file-path %t/optional_try_migration.result.swift
|
|
// RUN: %diff -u %S/optional_try_migration.swift.expected %t/optional_try_migration.result.swift
|
|
|
|
func fetchOptInt() throws -> Int? {
|
|
return 3
|
|
}
|
|
|
|
func fetchInt() throws -> Int {
|
|
return 3
|
|
}
|
|
|
|
func fetchAny() throws -> Any {
|
|
return 3
|
|
}
|
|
|
|
func testOnlyMigrateChangedBehavior() {
|
|
// No migration needed
|
|
let _ = try? fetchInt()
|
|
|
|
// Migration needed
|
|
let _ = try? fetchOptInt()
|
|
}
|
|
|
|
func testExplicitCasts() {
|
|
|
|
// No migration needed, because there's an explicit cast on the try already
|
|
let _ = (try? fetchOptInt()) as? Int
|
|
|
|
// Migration needed; the 'as? Int' is part of the sub-expression
|
|
let _ = try? fetchAny() as? Int
|
|
|
|
// No migration needed; the subexpression is non-optional so behavior has not changed
|
|
let _ = (try? fetchAny()) as? Int
|
|
|
|
// No migration needed, because there's an explicit cast on the try already
|
|
let _ = (try? fetchOptInt()) as! Int // expected-warning {{forced cast from 'Int??' to 'Int' only unwraps optionals; did you mean to use '!!'?}}
|
|
|
|
// No migration needed; the subexpression is non-optional
|
|
let _ = try? fetchAny() as! Int
|
|
|
|
// No migration needed; the subexpression is non-optional so behavior has not changed
|
|
let _ = (try? fetchAny()) as! Int
|
|
|
|
// Migration needed; the explicit cast is not directly on the try?
|
|
let _ = String(describing: try? fetchOptInt()) as Any
|
|
|
|
// No migration needed, because the try's subexpression is non-optional
|
|
let _ = String(describing: try? fetchInt()) as Any
|
|
|
|
}
|
|
|
|
func testOptionalChaining() {
|
|
struct Thing {
|
|
func fetchInt() throws -> Int { return 3 }
|
|
func fetchOptInt() throws -> Int { return 3 }
|
|
}
|
|
|
|
let thing = Thing()
|
|
let optThing: Thing? = Thing()
|
|
|
|
// Migration needed
|
|
let _ = try? optThing?.fetchInt()
|
|
|
|
// Migration needed
|
|
let _ = try? optThing?.fetchOptInt()
|
|
|
|
// No migration needed
|
|
let _ = try? optThing!.fetchOptInt()
|
|
|
|
// No migration needed, because of the explicit cast
|
|
let _ = (try? optThing?.fetchOptInt()) as? Int
|
|
|
|
// Migration needed
|
|
let _ = try? thing.fetchInt()
|
|
|
|
// Migration needed
|
|
let _ = try? thing.fetchOptInt()
|
|
|
|
// No migration needed, because of the explicit cast
|
|
let _ = (try? thing.fetchOptInt()) as! Int // expected-warning {{forced cast from 'Int?' to 'Int' only unwraps optionals; did you mean to use '!'?}}
|
|
}
|
|
|
|
|
|
func testIfLet() {
|
|
|
|
// Migration needed
|
|
if let optionalX = try? fetchOptInt(),
|
|
let x = optionalX
|
|
{
|
|
print(x)
|
|
}
|
|
|
|
// Don't change 'try?'s that haven't changed behavior
|
|
if let x = try? fetchInt(),
|
|
let y = try? fetchInt() {
|
|
print(x, y)
|
|
}
|
|
}
|
|
|
|
|
|
func testCaseMatching() {
|
|
// Migration needed
|
|
if case let x?? = try? fetchOptInt() {
|
|
print(x)
|
|
}
|
|
|
|
// No migration needed
|
|
if case let x? = try? fetchInt() {
|
|
print(x)
|
|
}
|
|
}
|